文章基本信息

标题：NITROGEN REMOVAL AND NITROUS OXIDE EMISSION ON SEQUENCING BATCH BIOFILM REACTOR AT DIFFERENT C/N RATIO
本地全文：下载
作者：Hongxiang Chai ; Yue Shen ; Chuanrong Su 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2017
卷号：26
期号：11
页码：6712-6719
语种：English
出版社：PSP Publishing
摘要：The wastewater treatment process can produce a large amount of nitrous oxide (N2O), which is an important source of carbon emissions. Generally the carbon emissions of the sewage industry accounted for 1-2% of the total social emissions, so it's necessary to work on reducing carbon emissions immediately and comprehensively. Sequencing Batch Biofilm Reactor (SBBR) is widely used as a kind of effective nitrogen and phosphorus removal process. The objective of this paper is to assess the N2O emission and treatment efficiency at different carbon/ni-trogen (C/N) ratios. The COD removal increased slowly and then decreased with the increase of C/N which was above 84%. When the C/N ratio was from 2.5 to 4.5, the NH4+-N concentration decreased rapidly from 13.62mg/L to 7.09mg/L. The TN removal was mainly concentrated in the anoxic zone and most of the degradation of TN was completed in the first one hour during the anoxic process, accounting for more than 66% of the total removal rate. The N2O cumulative emission rate and the N2O conversion rate were 0.70mg and 3.91mg, 1.14% and 6.94% that had a difference of 5.08 times, respectively. It was more reasonable to control the influent C/N ratio at6.5.
关键词：Sewage water;Carbon/nitrogen ratio;Biofilm;Nitrous oxide;SBBR